Signal processing of ultrasound modulated by gas flow. - Volker Hans; Volker Skwarek (IEEE Trans. Instrum. Meas., 2002)

Velocity-dependent characteristics of modulated ultrasonic signal in gas flow. - Mathias Niernann; Volker Hans (IEEE Trans. Instrum. Meas., 2002)

Self-Monitoring Ultrasonic Gas Flow Meter Based on Vortex and Correlation Method. - Yaoying Lin; Volker Hans (IEEE Trans. Instrum. Meas., 2007)